Ribbon mechanism for type-writing machines.



T E. BUSCHMANN.

RIBBON MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION HLED NOV. 22, 1913.

3 SHEETS SHEET 1.

1,165,941. I Patented 1m. 28, 1915.

4 T.-E. BUSCHMANN;

' RIBBON MECHANISM FOR TYPE'WRITING MACHINES.

APPLICATION men NOV. 22. ma.

Patented Dec 28, 1915.

T. E. BUSCHMANN. RIBBON MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED NOV. 22,1913.

' Patented Dec. 28, 1915.

3 SHEETSSHEET 3.

YU'NIED STAS sanssir @FFLCE;

THEODOR BUG-EN BUSCHMANN, OF CHEMNI'IZ, GERIMANY, ASSIGNOR TO THE FIE M OF WANDERER WERKE VORM. WINKLHOFER 86 JAENICKE AKT.-GES., OF SCHONAU,

NEAR CHEMNITZ, GERMANY.

RIBBON MECHANISM FOR TYPE-WRITING BIACHINES.

Specification of Letters Patent.

latented Dec. 28, 1915.

Application filed November 22, 1913. Serial No. 802,576.

- quired in two different colors or the ink-rib -bon guide is to be put out of action for waxed paper stenciling. In mechanism of this description, an arrangement is also required to cause the ink-ribbon guide to be adjusted into the black or red zone of the ink-ribbon, when typing accents by means of the so-called dead keys. For this pur pose, the ink-ribbon guide, for typing ordinary letters as well as for typing accents is .operated by the same driving member,

which, on the one hand, for typing ordinary letters, receives its movement from the uni versal bar, but on the other hand however I for typing accents, it is brought into action inoperative position.

by means of a transmission member open ated by the accent keys itself.

The invention is illustrated by way of example in the accompanying drawings, in whic Figure 1 is a side elevation of the mechanism fol-moving the ink-ribbon guide, in

its normal position, Fig. 2 is a corresponding elevation in the working position, Fig. 2* is a detail View showing the position of some of the parts when the ribbon vibrator is in Fig. 3 is a front View of a part of the mechanism according to the invention, corresponding to Fig. 2, Fig. a is a detailof the ink-ribbon guide lever with adjustment and balancing apparatus, Figs. 5 and 6 are details in side elevation.

The key lever 1, by means of the intermediate lever- 2, moves the type lever 3 in the known manner against the platen andthus causes the type to print. On moving the type lever 3, it presseswith a cam or shoulder 3 the segment-shaped universal bar a backward (to the right in Figs. 1 and 2). The universal bar 4 is guided in a corresponding cavity in the type lever support 5 and linked by means of a stirrup 4 to a guiding lever 6, which is p. votally mounted on the axle 7, for the purpose of guiding the universal bar almost parallel.

An intermediate member 8 formed as a rocking-lever, is movably arranged on the guide lever 6, one end of said intermediate member being held against an adjusting screw 20 by means of a tension spring and the other end is connected by means of a link 9 with a three-armed lever 10, which latter is pivotally mounted on the shift frame. An arm of this three-armed lever 10, which is rotatable'about the axle 11, engages with a pin 10" in an almost T-shaped slot 12 of a lifting bar or vibrator 12, which in its turn engages in a longitudinal slot 14? of the ribbon-guide lever 14 by means of a pin 13. The said ribbon-guide lever pivots about a pin 15, which is mounted in a bearinon the shift frame, the ribbon guide 17 hing by this means lifted upward until the ribbon reaches its printing position.

In the low position according to F ig. 1, the lifting bar 12 is limited or adjusted by means of a stop 18 movably arranged on the nift frame. For theupper movement of he ribbon, for black and red printing, the ifting bar 12 is limited in its lifting moven-t by an angle stop 12, which acts nst adjusting screws 19 and 19, which r are arranged in a bearing arm 40 of shift frame (Figs. 3 and 5):

arm 22 is secured on the rotatable axle and is connected by means of the link 23 spring 28 and secures the offset 25 in both of its end positions. The weight of the ribbonguide 17 as Well as the ribbon guide lever 14 .is counter-balanced by means of a tension spring 29 in order to obtain a lighter stroke.

In order to put the stroke of theribbon guide out of action, when stenciling with waxed paper, a rotary disk 30 is'arranged on theside wall of the frame of the in achine,

and a pin 31 provided on said disk 30 enroller 27, which co jperates with a plate ill) tatably arranged on the axle 2l,'"against the lower end of which is adapted. to act a shoe the shoe rests on a rod or special brie 1.. itself is 37 rotatably mounted on the pin 39 on the key lever 1. .The shoe 37 is yieldmgly maintained in position by means of. a tension spring 36,t o' counter-balancealterations or deviations in the lifting movement of the dead oraccent key levers The re-.

silient shoe 3?, which is provided foreach accent key is provided with. a bent part 37 I and the sole 0 bar 38 seivhich overlaps its key lever,

cured to the lower arm of the lever 34, un-

der the action of the spring 36.v The rod 38 extends beneath all the accent key levers and at the other end is also securedto a lever,

similarto the lower arm of the lever 34 and so that is rotatebly mounted on the axle 21, a stirrup is formed, which is I pivotally mounted on theaxle 21. The upper armof the lever its-rests against the pinlO of the three-armed lever 10 or actuating'lever for the vibrator and can transmit movement to some.

1 'll'ie operation of the mechanism is as foliowsz' If letters are to be typed in black inthe usual maimenthen the mechan sm, before commencingv to type, assumes the posi tion shown. in Fig. 1. When a key isstiuck, the cam surface 3 ofthetype lever 3 presses sci. bar 4 together with its stirrupv the L W The guidi 7 a rocking movement, whic the leverfi and the link 9' it'trans i the three-armed lever'lO. The liftthereby brought'into the posivvn in Fig. 2 and with the help of i3 the ribbon guide lever 14,

lifted into the black rinting osition. The adjusting of the ribbon in the normal position with relation to the printing line, justing the screw 20, the initial position of the ribbon guide lever i l may be altered by means of the twoarmed rocking lever 8, the link 9, the threeerined driving lever '10 and the lifting bar 12.

If typing in red is to be efi'ected, the axle 21 is rotated by means of a'known apparatus not shown on he d awings. The arm 22 i t; sreupon. act; (to the left in Figs. and rocks the twmarmed adjustwhich latter is rigidly connected with the ng lever 6 receives.-

on guide 17 together with the ribbon eight 0 the l is performed by ad with the help of whichv ing lever 24: on its fulcrum to the right until the pin 13 is so placed in the slot i l of the ribbon guide lever 14, that this lever 14: will perform a greater movement about its point of rotation 15, that is, it lifts the ribbon higher, until it reaches the red printing position. In both cases, when (printing in black aswell as when printing in red, the stroke of the rod 12 and therewith also the remainin part of the ribbon lifting appa ratus is ini'ited by the adjustable stops l9 and..19.

For stenciling with waxed paper, the disk 30 is rotated in the direction oi the arrow from theposition according to Fig. 2 into the position shown in Fig. 2*, thus lifting the arm 32 by means of the pin 31 and thereby rocking the arm 22 to the left in such a manner that the adjusting lever 2d and thelifting bar 12 reach the position shown in i Fig. 6, in which position, the pin 10 of the three-armed lever 10 will slide without any useful effect in the vertical part of the slot -12, so that thelii'iting bar 12 remains st'ationary. If the lifting bar 12 should, how ever, make a small lifting movement, on account of lateral friction, or of inaccurate adjustment into the idle middle position, then'the bent part 12 of the liftin bar 12 is caught by the stop 33 (Figs. 3 and-6) and its further movement prevented. When the lifting-bar 12 is situated in the position according to Fig. 6 for stenciling with. \waxed aper', care must be taken that said lifting ar '12, in the normal position of the 109 guide lever, does not sink down so far that the pin 10 of the driving lever it) enters into the vertical step of the T-shaped slot-12, because otherwise the lifting bar 12 cannot beagain guided backinto the position for red and black typing. For this purpose the bent part 12 of the lifting bar 12 acts against the correspondingly adjusted screw 18. v

It is possible that it may be required to change from the red type position as well. as from the black type position of the ribbon for stenciling with waxccbpaper. In order .to bring the ribbon levers immediately into the black type position after stenciling with waxed paper, the apparatus acts, accerding to this invention, in the following manner.

If by rotating the shaft 21 the ribbon levers are placed in the red type position,'the arm 32 moves slightly upward, so that the pin 31 of the dislt80 passes into the left lower angle of the curved slot 32 If the disk 30, while in this position, is. turned in the direc-. tion of thearrow, then its pin 31 also passes into the right extension of the curved slot 32, so that' jt is therefore of no importance whether the lovers are transferred from the red'or black type'position into the position for stencili'n with Waxed paper. liter finishing stenci .ing with Waxed paper, the disk moving to the ribbon guide lever, a

under the influence of E50 isrotated in the opposite, direction to that indicated by the arrow and, on account of the shape of the curved slot will be compelled to enter into the left upper angle of the curved slot, this position corre sponding to the black type position of the ribbon levers. I

Nhen typing accents, the accent key 1", the shoe 37 which is yieldable against the action of the spring 36, turns "the two-armed lever 3% about its axle 21, the upper arm of this lever then left toward the pin 10 of the driving lever 10, thereby imparting to the latter the necessary rocking movement for actuating the ribbon guide. This movement of the three-armed driving lever 10, which is not dependent on the universal bar 4 is rendered possible by the two-armed lever 8 being able to swing out against the action of the spring in a clockwise direction, when the three-armed driving lever 10 connected Withsaid lever 8 by means of the link 9, moves in the same directions. I claim 1. In a typewriting machine, a pivoted vibrator having a va- 32 the pin 31 special type levers, a bar common to all the special key levers, devices actuated by the latter bar to actuate the vibrator and mechanism to move the vibrator into inactive position with respect to said type levers and with respect to said devices, said mechanism also serving to change the amplitude of vi: bration of the vibrator. v

5. In a ty ewriting machine, a universal bar, a rock-s aft actuated therefrom, a ribbon guide,

a ribbon guide lever connected therewith, a vibrator having a pinan (1 slot connection with said lever, a three-armed driving lever, yielding connectionsbetween said bar to riable point of connection with said lever, a

pivoted adjusting lever to vary the pointof connection between said vibrator and guide lever, an actuating lever for the vibrator having a fixed pivot and means to move the vibrator into inoperative position with re- ,bar, accent key key-lever-actuated mechanism spect to its actuating lever.

2. In a type-writing machine, the combination with a ribbon vibrating mechanism and means to shift the vibrating mechanism to cause the vibrations of the ribbon. to be operative with respect to one or the other fields of a bi-chromeribbon', of a universal bar, type bars having means to actuate said bars inoperative with respect to the universal bar, key levers and connections for actuating said bars, accent key lever actuated mechanism to operate the ribbon vibrating mechanism and means to move said ribbon vibrating tive position and simultaneously render the accent key lever actuated mechanism inoperative.

3. In a typewriting machine, a ribbon vi 'brating mechanism including a vibrator,

position the vibrator to vary its of vibration and also to render lever, accentto actuate the to render means to amplitude it inoperative, an accent key vibrating mechanism 'and means said accent-key-lever actuated mechanism 1n-- operative and simultaneously place the, vibrator in inoperative position.

4. In a typewriting machine, a, series of type levers, a universal bar actuated thereby, special type levers, a ribbon vibrator actu-' ated by said bar but capable of independent operation, special key levers to actuate said mechanism to inopera-.

-- therewith,

slot, and a pin and slot connection with said said lever and rock-shaftpermitting relative movement with respect thereto, a vibratingguide having a pin and slot connection with the vibrator, means to position said vibrator guide and thereby govern the position of the vibrator to vary the amplitude of movement of the vibrator or render the vibrator inoperative, a special bar, special key levers to operate said bar and means actuated by actuate said driving lever independently of the universal bar.

6. In a typewriting machine, bar, a rock shaft actuated therefrom, bon guide,

a riba vibrator having a T-shaped lever, a three-armed driving lever, a pin on one of its arms entering'said T- haped slot, yielding adjustable connecting means etween said v rock-shaft and driving lever whereby the ribbon guide is vertically adjusted, a pivoted vibrator guide having a pin .and slot connection with the vibrator, de-

therewith, a vibrator vices to i'otate said vibrator guide and there by vary the amplitude of movement of the ribbon guide lever, and means to independently move said devices to. render the vibrator inoperative.

' 7. In a typewriting machine, a universal bar, a rock-shaft actuated therefrom, a ribbon guide, a ribbon guide lever connected having an inverted T-shaped slot and a pin and slot connection with said lever, a three-armed driving lever, a pin on one of its arms entering said T-shaped slot, adjustable yielding connecting means between said rock-shaft and driving lever, a pivoted vibrator guide having a pin and-slot connection withthe vibrator,

devices to rotate said vibrator guide and thereby swing the vibrator with respect to the pinin its T-shaped slot, cooperating adjusting stops to positively limit the upward and downward movements of the vibrator, and a stop to prevent the movements of, the vibrator when in its inoperative positidn. v

8. In a typewriting machine, a universal bar, a rocksshaft actuated therefrom, a ribbon guide, a ribbon guide lever connects therewith, a vibrator having a a ribbon guide .lever connected a universal pin and slot lea iammsm (subsection with Sam lever, 21 'iflu'eemirmal stops for said. vibratm' guide to alias-i; i135; .H: driving lever having a pin and aiot conend positions.

nec'binn. with the vibrator adjustable yield In testimony whereof. I have :u'fixed my ing connecting means between said rock signature.

2 mid-driving i fibwiw mmomm 13mm Bmamumm. gulde huvmg a pm and slot connectlon wxth the Viblfitfll, devices 510 rntate said vibm'mr In the pre ame of guide, yielding means zo hold said vibrator I? KILBOURNE Faom, gmde 1n Hvs end poslmons, mm} adgusmblv, MARTHA Emma. 

